{
  channelsNixosStable = {
    ref = "nixos-19.03";
    rev = "67bc63f9a7ac1b4d1a7114c88ca1a4df03bfdb0e";
  };
  channelsNixosUnstable = {
    ref = "nixos-unstable";
    rev = "acbdaa569f4ee387386ebe1b9e60b9f95b4ab21b";
  };
  nixpkgsMaster = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "cb601bbfedf43fa116a538f818227c1464f73095";
  };
  homeManagerModule = {
    url = "https://github.com/rycee/home-manager";
    ref = "master";
    rev = "f8b03f5750679d6686eefa60d5de8cfd932b8997";
  };
}